Air Conditioning Inspections (Indoor Air Quality / Energy Reduction)


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Peter Dyment ~ Energy Consultant ~ Camfil Farr
People see the Air Conditioning Energy Inspections as a burden rather than a benefit, instead of seeing the AC Inspection as an opportunity to get air conditioning systems to run better & “save energy” “save carbon” “save money” & Improve Indoor Air Quality (IAQ )

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Air Conditioning Inspections (Indoor Air Quality / Energy Reduction)

  1. 1. Welcome to the Camfil Farr Training Academy This webinar shows the benefits Low Energy Air Filters and how they deliver Sustainable Air Quality The combination of optimum Air Quality and Energy Efficiency are a key feature. © CAMFIL FARR 11-03-28 1
  2. 2. Low Energy Air Filters Production Facility ● Sales Office ● Agent ● Head Office ● © CAMFIL FARR 11-03-282010 global sales £430 million24 Production Plants, 4 R&D Centres 23400 employees
  3. 3. Camfil Farr Low Energy Air Filters saveMoney, Energy and CarbonBut also deliver Sustainable Air Quality 3
  4. 4. Stay healthy – with better Indoor Air Quality (IAQ)• Low Energy Air Filters deliver sustainable air quality• Health benefits from reduced levels of PM2.5 fine particulates.• Reduction in illness due to the effects of air pollution and staff productivity improvements• Air pollution adversely affects the growth of lung function during the period of rapid lung development © CAMFIL FARR 11-03-28 that occurs between the ages of 10 and 18. (The New England Journal of Medicine) 4
  5. 5. Health risk filtering out - Supply Air Pollutionreduced • 50, 000 people in the UK die before their time because of particle pollutants (HMG report 0310) • Particles of fine soot are the most dangerous for one’s health (combustion particles) • Combustion particles are very small <1 µm and toxic © CAMFIL FARR 11-03-28 • These ultra-small particles causes heart- and vascular disorders 5
  6. 6. Air Quality problems in the UK UK Government report indicates PM2.5 pollution is 3X more damaging to public health than passive smoking. 5X more damaging than loss of life due to road accidents © CAMFIL FARR 11-03-28 6
  7. 7. Low Energy Air Filters for Indoor Air Quality Why we need Air Filters? The primary purpose of Air Filters in building HVAC systems is to filter and clean air for people to breathe without risk to health. The secondary purpose of Air Filters in building HVAC systems is to filter air to keep clean and protect the air plant duct system and the internal fabric of the building. © CAMFIL FARR 11-03-28 7
  8. 8. The relevant standards for Low Energy Air Filters The filter test standard that applies to the testing of air filters is EN779:2002 EN13779:2007 advises F7 as a minimum and F9 as the advised for required particulate © CAMFIL FARR 11-03-28 efficiency 8
  9. 9. Particulate Efficiency % © CAMFIL FARR 11-03-28 Particle Size Microns 9
  10. 10. Particulate Efficiency % © CAMFIL FARR 11-03-28 Particle Size Microns 10
  11. 11. Particulate Efficiency % © CAMFIL FARR 11-03-28 Particle Size Microns 11
  12. 12. Fixed Resistance? Energy Consumed by Air Filters Air Handling Unit Cooling coil Heating coil Sound attenuator FAN MOTOR © CAMFIL FARR 11-03-28 Variable Resistance? Pre-filter Gas-filter Secondary-filter 12 (Carbon)
  13. 13. Energy consumed by air filters Clean air with economic benefits The cost of ventilation Pascal• The energy requirement for 40% ventilation is expensive. 30% of total system• Filters account for approx. 30% of pressure loss the total energy cost of the 20% system. (C.I.B.S.E. data)• Filters are the most inexpensive part of the system to improve. 4% © CAMFIL FARR 11-03-28• Without Capital Expenditure 13
  14. 14. Energy consumed by air filtersExample of urban offices block and savings Office block 8000M2 floor area with 30 full size filter apertures. (3 AHU’s) This office block can show an energy saving of £ 14430 per year with the equivalent of 3 © CAMFIL FARR 11-03-28 AHU’s as shown in the next slide. 14
  15. 15. Energy consumed by air filtersEnergy saving on one AHU volume flow 10m3/s over one year Replaced by F7 Bag + G4 Panel F7 Hi-Flo Bag 2.9 M2 Media 9.2 M2 Media © CAMFIL FARR 11-03-28This represents a money saving of £ 4810 per year on this AHU or saving of over 70% on electric energy. 15
  16. 16. How we optimise our air filter selection Impact assessment• 200 Buildings• Serviced by 5 air handing units• Each having 10 standard 2 stage apertures• Number of 2 Stage apertures• 200 x 5 x 10 = 10,000 apertures• Will make annual Energy savings (considered on above criteria)• WILL SAVE ENERGY VALUE OVER 2.3 MILLION POUNDS• EACH YEAR EVERY YEAR 16
  17. 17. How we optimise our Low Energy Air Filter selectionA Hi-flo F7 M7 Bag filter with 9.2 M2 of micro- fibre media has the optimum low pressure drop and consistent high particulate efficiencywith a longer working life BS:EN13779:2007 advises F7 minimum efficiency 17
  18. 18. Energy consumed by Air Filters Clean air with economic benefits Choosing the right bag filter saves Energy• Low Energy Air Filters use an optimised design in order to minimise energy consumption with Tapered stitch on pockets.Poorly manufactured pockets lose performance, use more energy 18
  19. 19. The energy demand Clean air with economic benefitshis equation calculates the kilowatt hours consumed by an element of aventilation system based upon average pressure loss q ×dP × tE= [ kWh/year] η ×1000 q = Air flow (m3/s) dP = Pressure drop (Pa) © CAMFIL FARR 11-03-28 t = Operating time (hours/year) h = Fan efficiency (20% - 65% ?) 19
  20. 20. Life cycle costing & air system factors Clean air with economic benefitsEnergy is part of the LCC model The life cycle cost for the filter is the cost of the: • Filters • Labour • Energy consumption • Cleaning of ventilation system © CAMFIL FARR 11-03-28 • Disposal of used filter = LCC 20
  21. 21. Check the Indoor Air Quality Factor (IAQ factor)The IAQ factor is found bydividing the LCC by theMLE. It tells you how muchfilter performance you aregetting for your money.EG. M7 F7 bag = 24.7 IAQG4 S-Flo-F7 bag = 154.6 IAQ6.25 X per % minimum lifeefficiency (MLE) 21
  22. 22. Energy Optimisation with Low Energy Air FiltersFor example using F7 filter grade as advised by BS:EN13779:2007Options:6 pocket 380mm long bag has about 200pa pressure drop initially12 pocket 635mm long bag has about 85pa pressure drop initiallyOver a period of one year allowing for the pressure drop increases asthe filters work the estimated save in energy consumption as below.**Energy £300 the difference in filter price is about £30** © CAMFIL FARR 11-03-28(Ratio 10:1 at 10p per KW/hr.) 22
  23. 23. Filter optimisation gives shortest payback time Annual Savings – for a 10 m3/s systemElement % Kwhr £ Revenue or capital PaybackUpgrade filters 22% 6000 600 Revenue < 3 monthsClean coils 10% 2500 250 Revenue < 6 monthsUpgrade fans 35% 60000 6000 Capital > 24 monthsUpgrade chillers 40% 136000 13600 Capital > 36 months © CAMFIL FARR 11-03-28 Table is prioritised by payback period Data source – EECO2 Energy Efficiency Consultants (Low Carbon Consultants) 23
  24. 24. Low Energy Air Filter Service Packages • Low Energy Air Filter AHU filter mounting upgrades • Complete Low Energy Air Filter installation and maintenance contracts • AHU filter monitoring with demonstration of benefits © CAMFIL FARR 11-03-28 • Additional Duct cleaning and coil cleaning AHU system packages. 24
  25. 25. Take the Energy Saving Opportunity£14430 per year Low Energy Air Filters There are over 36000 buildings and only about 10% have been inspected © CAMFIL FARR 11-03-28 25
  26. 26. THANK YOU for attending this webinar session ANY QUESTIONS? Please do not hesitate to contact Camfil Farr for any additional information or to arrange a visit.For more information about clean air solutions, improving air quality, low energy air filters, CRC (Carbon Reduction Commitment), AHUs (Air Handling Units) and the EPBD, visit the blog and subscribe to the RSS Feed 26